Cyclone on a shared configuration bus


is it possible to configure a Cyclone device connected to a shared serial configuration bus using the nCE signal as DCLK enable? I would like to configure it from a SecureDigital card using Passive Serial mode and an external microcontroller responsible for generating DCLK and SD protocol-specific communication with the card. The configuration should be as fast as possible, so I don't want to implement two separate data channels (SD => MCU and MCU => FPFA), but to connect SD.MISO to FPGA.DATA0 and SD.CLK to FPGA.DCLK and then simply generate the clock signal using the MCU. But using this way I can read only a sector from the card, then I must prepare the next sector and so on. This setup requires communication with the card and, obviously, Cyclone should not read configuration stream then. Can I set nCE to 1, do the necessary sector setup,then set it back to 0 and send the next part of the stream?

Best regards Piotr Wyderski

Reply to
Piotr Wyderski
Loading thread data ...

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.